Bumper of a truck vehicle



FIG. 1 is a left, front perspective view of bumper of a truck showing our new design shown installed on a truck, it may be understood that the broken lines are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof; and,

FIG. 5 is a right side view thereof. 

The ornamental design for a bumper of a truck vehicle, as shown and described. 